package com.dgut.smart_house.shiro;

import org.apache.shiro.web.servlet.ShiroHttpServletRequest;
import org.apache.shiro.web.session.mgt.DefaultWebSessionManager;
import org.apache.shiro.web.util.WebUtils;
import org.springframework.util.StringUtils;

import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import java.io.Serializable;

public class MySessionManager extends DefaultWebSessionManager {
        /**
         * 这个是服务端要返回给客户端，
         */
        public final static String TOKEN_NAME = "TOKEN";
        /**
         * 这个是客户端请求给服务端带的header
         */
        public final static String HEADER_TOKEN_NAME = "token";
        private static final String REFERENCED_SESSION_ID_SOURCE = "Stateless request";

        /**
         * 重写getSessionId,分析请求头中的指定参数，做用户凭证sessionId
         */
        @Override
        protected Serializable getSessionId(ServletRequest request, ServletResponse response){
            String id = WebUtils.toHttp(request).getHeader(HEADER_TOKEN_NAME);
            //System.out.println("id："+id);
            if(StringUtils.isEmpty(id)){
                //如果没有携带id参数则按照父类的方式在cookie进行获取
                //  System.out.println("super："+super.getSessionId(request, response));
                return super.getSessionId(request, response);
            }else{
                //如果请求头中有 authToken 则其值为sessionId
                request.setAttribute(ShiroHttpServletRequest.REFERENCED_SESSION_ID_SOURCE,REFERENCED_SESSION_ID_SOURCE);
                request.setAttribute(ShiroHttpServletRequest.REFERENCED_SESSION_ID,id);
                request.setAttribute(ShiroHttpServletRequest.REFERENCED_SESSION_ID_IS_VALID,Boolean.TRUE);
                return id;
            }
        }

}
